Meat-grinder



W. l. ANDERSON.

MEAT GRINDER.

APPLICATION man MAY12,1,919.

IN VEA/'TOR if@ @www WILLIAM JOHN ANDERSON, OF DULUTH, MINNESOTA.

MEAT- GRIN DER.

Specicaton of Letters Patent.

Patented Feb. 17, 1920.

Application filed May 12, 1919. Serial No. 296,525.

T0 all whom t may concern.'

Be it known that l, WILLIAM JOHN ANDERSON, a subject of the King of Sweden, residing at Duluth, in the county of St. Louis and State of Minnesota, have invented certain new and useful Improvements in Meat-Grinders, of which the following is a specication, reference being vhad therein to the accompanying drawing.

This invention relates to grinding or disintegrating machines andhas special reference to a meat grinder.

The principal object of the invention is to provide a machine'of this character requiring less power for its successful Voperation than that necessary in similar makes of ma chines.

Another object is to provide certain novel safety means for such machines.

Another object is to provide a novel and efcient form of rotating knifefor such machines.

Still other objects are of likeness of construction and reduction in size of such ma chines. Y p

Referring to the accompanying drawings forming part of this application and in. which like reference characters indicate like parts:

Figure 1 is a central vertical sectional view through one of the assembled machines,

' Fig. 2 is a diagrammatic elevation of the driving-gears,

Fig. 3 is a front elevation of the knife and forcing member. v

Fig. 4 is a transverse section on the line 4 4, Fig. 3, and

Fig. 5 is a similar view on the line 5-5, Fi 3.

Frepresents the cylindrical body-portion of the grinder housing, surmounted by the inverted frusto conically shaped feeding hopper, 2. The front closed end 3 of the housing is surrounded by a concentric projecting rim 4, forming a cylindrical chamber 5, in which the driving-gears of the grinder are housed. This chamber is provided "with a suitable cover or head 6, which acts as a closure for same. The internally cogged ring-gear 7 is made to fit within the chamber 5 and has formed integral therewith a graduated hub sleeve, comprising the cylindrical portion 8 and the rectangular portion 9. This hub extends within the end 3 and is rotatable therein upon the hub portion 8, while the rectangular portion 9 eX- tends into and rotates the feeding screw or worm 10, which is mounted within the bodyportion 1 of the grinder housing. V

A. central axial shaft 11 extends through the sleevedhub of the gear 7 and extends to adjacent the opposite open end of the bodyportion 1 of the grinder housing, where it carries upon its reduced rectangularlyshaped end 12, the hub 13 of the knife and forcing member. Upon the forward end of the shaft 11, and within the ring-gear 7 is securely fixed the spur-gear 14. Within the head 6 is suitably journaled on the short shaft 15, the intermediate gear 16, which meshes with and is driven by the gear 17 mounted upon the crank-shaft 13, the intermediate gear 1G also meshing with and driving the gear 1li.

A suitable crank 19 is shown as mounted upon the shaft 18 and by which the machine may be operated. However, it is evident that same may be accomplished by suitable electric or air motors if desired.

By this arrangement of transmission, it is evident that the spur-gear 111` will travel in the same direction that the crank-gear 17 travels, which,when the machine is operating, is in clockwiscfdirection, and it is also evident that by the arrangement here shown, the shaft 11 will make four rotations to the ring-gears one. Thus, when the worm 10 is being rotated by .the spur-gear 17 and forcing the contents of the grinder toward the perforated plate or grid 20, which is fixed in any desired manner in the open end of the body-portion 1, the knife 21 and crowder 22, which are formed integral with the hub 13, will be rotating at a higher rate of speed than the worm to maintain suf cient clearance of the contents of the grinder at the end of the worm.

I have shown an annular threaded ring 23, which is applied to the externally threaded end of the body-portion 1, this be ing for the purpose of holding the grid 20 in position and which may be applied or removed manually.

At the junction of the hopper 2 with the cylindrical body-portion 1, is an arcuately shaped hollowed out or recessed portion 24, the object of which is to provide a ready escape of the lingers of the operator, provided he should chance to follow the contents of the grinder abnormally far in feeding same.

Within the knife 21 is formed a slot 25 adjustably carrying the blade 26, the outting edge of which operates adjacent, if not impinging, the inner face of the grid 20. This blade is made adjustable by the screw 27 and held in its adjusted position by the screws 28-28- The crowding or propeller blade 22 is of approximately ogival shape at both ends, the leading` edge being farthermost from the grid and of arcuate form in elevation, While the opposite edge is a true radial line and is the closer to the grid, though designed not to touch saine.

As an outer axial support to the shaft l1 and its cooperative parts, a stub shaft or pin 29 is screw-threadedly attached to the outer central portion of the hub 13 and eX- tends through a suitable hole in the center of the grid 20 and into the sleeve 3() supported on the spider 31 formed integral with the annular ring 23 and which sleeve forms a suitable bearing therefor as well as abutting the central portion of the grid and bracing same against outward pressure.

By this peculiar form of knife and propeller blade, it is obvious all of the con tents delivered from the end of the worm 10 will positively be forced against the grid 20 and, by the cutting edge of the propellerblade, will be severed from its connection with the worm 10 before being crowded into `the grid.

I am aware meat grinders have been made wherein the knife operating adjacent the grid rotates at a speed greater than that of the worm and do not claim this as a novel feature. However, with the peculiar combination here disclosed, it is evident that novel results are obtained and in'that the knife is provided with the coperating crowding-blade, a much shorter worm than heretofore employed and other advantages before enumerated, result.

It is to be understood that various modications and changes within the scope of the claims may be resorted to without departing from the spirit of the invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

l. In a machine of the character described, including a cylindrical body-portion, a rotating feeding wormtherein and a perforated grid, of a cooperative crowding blade and diametrically opposed cutting blade intermediate of the grid and the end of the worm.

2. In a machine of the character described, including a cylindrical body-portion, a rotating feeding worm therein and a perforated grid, of a coperative crowding blade and a cutting blade formed integral with each other diametrically opposed and intermediate of the grid and the end of the worm.

3. A cutting and propelling knife for meat grinders comprising a hub portion, a radially disposed blade carrying portion having an adjustable blade therein and a substantially opposed propeller blade.

In testimony whereof I have hereunto af fixed my signature in the presence of two witnesses.

VILLIAM JOHN ANDERSON.

Witnesses:

A. M. OUELLETTE, S. GEO. STEVENS. 

